June in Seward is the cloudiest month of the year. In June, the weather in Seward is typically warm. Average daily high temperature in June is about 10 degrees above zero. On average, Seward has 16 rainy, 7 cloudy, 5 partly cloudy, and 2 sunny days in June. The rains are usually heavy. June as well as May, July, August, and September is considered the most uncomfortable time to visit Seward.